Thieds to john ritchie-and michael l



(No Model.)

P. W. RITCHIE. COMBINATION TOOL.

No. 303,666. Patented Aug. 19, 1884.

UN TED PATENT OFFICE.

FREDIERICK IV. RITCHIE, OF VANCEBOROUGI-I, MAINE, ASSIGNOR O F TIVO-THIRDS TO JOHN RITCHIE AND MICHAEL L. ROSS, BOTH OF SAME PLACE.

COMBINATION-TOOL.

SPECIFICATION forming part of Letters Patent No. 303,666, dated August19, 1884.

Application filed November 21, 18MB. (No model.)

To (all who/72, it mm-y concern: 7

Beitknown that I, FREDERICK W. Rrrcnrn,

of Vanccborough, in the county of \Vashington and State of Maine, haveinvented certain new and useful Improvements in Gombina tion-Tools; andI do hereby declare that the following is a full, clear, and exactdescription of the invention, that will enable others skilled in the artto which it apperta-ins to make and use the same, reference being had tothe accompanying drawing, forming a part ofthis specification, whichshows a perspective of my invention.

My invention relates to a combination-tool embodying a square, bevel,plumb, and level, and will be readily understood by reference to theannexed drawing, in whicha shows the metal arm of the square inserted,as usual, in the wooden arm b, at right angles thereto. At 0 is a cavitycut in said wooden arm for the reception of a tube containing air andfluid, and serving as a plumb when the tool. is used as aplu1nhing-instrument, while at d is a secondtube, also containing airand fluid, for use when the device is employed as a level. The parts ofthe wooden arm I) near said tubes are strengthened by metal platesl2 onall sides. The arm I), at the end farthest from the arm a, is slottedfor a portion of its length and receives within this slot 0 a secondadjustable arm, f, having a slot, 9, therein, through which passes ascrew, h, having a thumbnut, i, by which the arm f can be adjusted andheld at different angles, enabling any required bevel to be obtained;or, when the tool is used as a level, this adjustable arm may be used tolengthen the arm I), thus increasing the accuracy of the instrument. To

this end the arm I) is provided. with a slot, 8, extending diagonally ortransversely thereon, or curved obliquely to the length of said arm 0.The screw h passes through this slot 8, and may be moved therein towardeither edge of the arm I), so as to permit the edge of the bevel-arm fto be brought into line with either 5 of the edges of the square arm b;or, if desired, the arm f may be removed from the slot and secured tothe outer surface of the arm I). This is of advantage in makingdrawings, &c.

In many cases it is advantageous to have the bevel arm situated at theextremity of one of the legs of the square, at a distance from the anglethereof, as it can then be set at any desired angle to the other leg,while at a considerable distance from the same, thus giving theinstrument greater reach and variety of usefulness. By means of thelongitudinal slot in the bevel-arm it may be caused to extend its fulllength from the square-leg, or to extend on both sides of the leg atonce by being clamped at the middle of the slot. This also is aconvenience in many situations.

\Vhat I claim as my invention is- Theherein-described combination-tool,consisting of the try-square composed of the two fixed or rigid arms ab, and having the plumb c and level (I, the slotted bevel-arm f, pivotedto the arm (I of the try-square at the opposite end thereof from the arma, and the curved slot 3 and screw h, whereby said bevel-arm may beclamped at any desired angle above or below the arm b, or in linetherewith, to form an extension of either edge thereof, substantially asshown and described.

In testimony that I claim the foregoing I have hereunto set my hand this13th day of November, 1883.

FREDERICK IV. RITCHIE.

